feat: Implement (most) API endpoints

backend/src/utils/user.ts

@@ -1,8 +1,8 @@
 import { Db } from "mongodb";
 
-import { IUser } from "../models/user";
+import { IUserDBModel } from "../models/user";
 
-export async function userFromSession(token: string, db: Db): Promise<IUser> {
+export async function userFromSession(token: string, db: Db): Promise<IUserDBModel> {
     // Get the username
     const session = await db.collection("sessions").findOne({ token, });
     if (session) {